Growler FAQ...

What is a Growler?
Growlers are generally refillable conatiners into which tap beer is poured for home consumption. They are usually 64 oz in size but some businesses
will fill 32 oz Growlers. And in some cases they can go much larger.

How long does beer last in a Growler?
If unopened, 7-10 days. Once open, 2 days is the max.

How to clean your Growler?
If recently consumed, use hot water with a little dish soap making sure it is rinsed well. For longer periods, a sanitizer might be necessary before refilling.
You can get more info here